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George Zucco
Lorenzo Cameron

Anne Nagel
Lenora Cameron

Johnny Downs
Tom Gregory

Glenn Strange
Petro

Robert Strange
Professor Blaine

Gordon De Main
Professor Fitzgerald

John Elliott
Professor Hatfield

Reginald Barlow
Professor Warwick

Sarah Padden
Grandmother

Mae Busch
Susan

Ed Cassidy
Father

Henry Hall
Country Doctor

Eddie Holden
Jed Harper